This is an instruction manual that introduces the use of HI 96733C Ammonia High Range ISM.
The HI 96733C is an auto-diagnostic portable microprocessor meter designed to measure ammonia nitrogen (NH3-N) content in water samples within a range of 0.0 to 50.0 mg/L. It utilizes the Nessler Method, an adaptation of ASTM D1426-92, and features an advanced optical system with a tungsten lamp and narrow band interference filter for accurate and repeatable readings. The instrument includes a CAL CHECK validation function and is splash waterproof for field applications.
The manual covers preliminary examination, startup procedures, measurement and validation steps, calibration, and battery management. It details the functional description of the keypad and display, explains the principle of operation based on photometric chemical analysis, and lists specific errors and warnings to assist users in troubleshooting.
| Measurement Range | 0.0 to 50.0 mg/L (as NH3-N) |
|---|---|
| Resolution | 0.1 mg/L |
| Accuracy | +0.5 mg/L +5% of reading @ 25°C |
| Light Source | Tungsten Lamp |
| Light Detector | Silicon Photocell with narrow band interference filter @ 420 nm |
| Method | Adaptation of ASTM D1426-92, Nessler Method |
| Operating Environment | 0 to 50°C (32 to 122°F); max 95% RH non-condensing |
| Battery | 1x9 volt |
| Dimensions | 192 x 104 x 69 mm (7.6 x 4.1 x 2.7") |
| Weight | 360 g (12.7 oz) |
The instrument measures ammonia nitrogen content in the 0.0 to 50.0 mg/L (ppm) range.
It uses an adaptation of the ASTM Manual of Water and Environmental Technology, D1426-92, Nessler Method.
The meter has an auto-shut off feature that turns it off after 1 hour of non-use in calibration mode.
The required reagents are HI 93733A-0 Nessler Reagent and HI 93733B-0 Ammonia Reagent B.