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MODEL 54eA SECTION 1.0
SPECIFICATIONS
SPECIFICATIONS — OXYGEN
Measurement Range: 0-99 ppm (mg/L), 0-200% sat-
uration
Resolution: 0.01 ppm, 0.1 ppb for 499A TrDO sen-
sor
Temperature correction for membrane permeabili-
ty: automatic between 0 and 50°C (can be dis-
abled)
Calibration: automatic air calibration or calibration
against a standard instrument
Pressure sensor range: 113 to 862 mmHg (151 to
1149 mbar)
RECOMMENDED SENSORS —
OXYGEN:
Model 499A DO-54 for ppm level
Model 499A TrDO-54 for ppb level
Hx438 and Gx448 steam-sterilizable oxygen sensors
SPECIFICATIONS — FREE CHLORINE
Measurement Range: 0-20 ppm (mg/L) as Cl
2
Resolution: 0.001 ppm
Temperature correction for membrane permeabili-
ty: automatic between 0 and 50°C (can be dis-
abled)
pH Correction: Automatic between pH 6.0 and 9.5.
Manual pH correction is also available.
Calibration: against grab sample analyzed using
portable test kit.
RECOMMENDED SENSOR — FREE
CHLORINE:
Model 499A CL-01-54
SPECIFICATIONS — pH
Application: pH measurement available with free
chlorine only.
Measurement Range: 0-14 pH
Resolution: 0.01 pH
Sensor Diagnostics: Glass impedance (for broken or
aging electrode) and reference offset. Reference
impedance (for fouled reference junction) is not
available.
Repeatability: ±0.01 pH at 25°C
Stability: ±0.01 pH/month, non-cumulative at 25°C
RECOMMENDED pH SENSORS:
Model 399-09-62, 399-14, and 399VP-09
See pH sensor product data sheet for complete ordering
information.
SPECIFICATIONS — TOTAL CHLORINE
Measurement Range: 0-20 ppm (mg/L) as Cl
2
Resolution: 0.001 ppm
Temperature correction for membrane permeabili-
ty: automatic between 5 and 35°C (can be dis-
abled)
Calibration: against grab sample analyzed using
portable test kit.
RECOMMENDED SENSOR — TOTAL
CHLORINE:
Model 499A CL-02-54 (must be used with SCS 921)
SPECIFICATIONS — OZONE
Measurement Range: 0-10 ppm (mg/L)
Resolution: 0.001 ppm
Temperature correction for membrane permeabili-
ty: automatic between 5 and 35°C (can be dis-
abled)
Calibration: against grab sample analyzed using
portable test kit.
RECOMMENDED SENSOR — OZONE:
Model 499A OZ-54
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