Severity: 8192
Message: Return type of CI_Session_files_driver::open($save_path, $name) should either be compatible with SessionHandlerInterface::open(string $path, string $name): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 132
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: 8192
Message: Return type of CI_Session_files_driver::close() should either be compatible with SessionHandlerInterface::close(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 294
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: 8192
Message: Return type of CI_Session_files_driver::read($session_id) should either be compatible with SessionHandlerInterface::read(string $id): string|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 168
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: 8192
Message: Return type of CI_Session_files_driver::write($session_id, $session_data) should either be compatible with SessionHandlerInterface::write(string $id, string $data): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 237
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: 8192
Message: Return type of CI_Session_files_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 317
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: 8192
Message: Return type of CI_Session_files_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Filename: drivers/Session_files_driver.php
Line Number: 358
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 282
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 294
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 304
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 314
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 315
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 316
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 317
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: ini_set(): Session ini settings cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 375
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: session_set_save_handler(): Session save handler cannot be changed after headers have already been sent
Filename: Session/Session.php
Line Number: 110
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Severity: Warning
Message: session_start(): Session cannot be started after headers have already been sent
Filename: Session/Session.php
Line Number: 143
Backtrace:
File: /home/zytroni1/public_html/coolingquest.com/application/controllers/Website.php
Line: 8
Function: __construct
File: /home/zytroni1/public_html/coolingquest.com/index.php
Line: 318
Function: require_once
Ask An Expert
Visible Spectrophotometer TRVS-601 is a compact benchtop device. The holographic blazed grating is monochromatic, with high wavelength accuracy, and low stray light. The wavelength ranges from 325 to 1000 nm with an accuracy of 2 nm and a spectrum bandwidth of 2 nm is measured using a microcomputer. It has a 7-inch multi-color touch-screen to view and set parameters. Its photometric value ranges from 0.0 to 100.0 % T, 0 to 1.999A, and 0 to 1999 C, with a ±0.5 % T accuracy.
| Photometry | Single beam |
| Monochromatic Type | Littrow |
| Focal Length | 160 mm |
| Wavelength Setting | Manual Turn Knob |
| Wavelength Range | 325 to1000 nm |
| Wavelength Accuracy | ± 2 nm |
| Wavelength Repeatability | ≤ 1 nm |
| Cuvette Holder Size | 10 mm |
| Photometric Range | 0.0 to 100.0% T, 0 to 1.999A, 0 to 1999C |
| Photometric Accuracy | ± 0.5% T |
| Photometric Repeatability | ≤ 0.2% T |
| Spectrum Bandwidth | 2 nm |
| Grating | 1200 lines/mm |
| Detector | Silicon Photocell |
| Stray Light | ≤ 0.1% ( at 360 nm NaNO2 ) |
| Noise | 100%(T) noise ≤ 0.3% (T), 0% (T) noise ≤ 0.2% (T) |
| Drift | ± 0.5% T/3 min |
| Power | AC220v±22v,50Hz± 1Hz, 80W |
| Packing Size | 580×460×340 mm |
| Weight | 0.1CBM, 14 Kg |
