Customer Service 800-528-7411 or 602-470-1414
Page 7 of 68
the 631-X to AC power to charge the battery pack; see the Maintenance Section of
the 631-X manual.
4 SPECIFICATIONS
The heart of the 651 is a Jerome 631-
X instrument; refer to the “631-X Operation
Manual” (P/N 700-0037) for specifics on the 631-X. The accuracy and repeatability
specifications of the 651 are relaxed to take into account the continuous use of the
631-X sensor.
651 Specifications
Detectable range
0.003ppm (3ppb) to 50ppm H
2
S in four graduated
ranges
Resolution
0.001, 0.01, 0.1, and 1ppm H
2
S (four ranges)
Repeatability
8% relative standard deviation
Accuracy
Range 0: ± 0.005ppm at 0.050ppm H
2
S
Range 1: ± 0.05ppm at 0.50ppm H
2
S
Range 2: ± 0.5ppm at 5.0ppm H
2
S
Range 3: ± 2ppm at 25ppm H
2
S
Estimated sensor life
6 months at 30-minute sample interval and 48-
hour regeneration interval. 3 months at 15-
minute sample interval and 24-hour regeneration
interval. The interval could be extended in ideal
operating conditions.
Flow rate
150cc/min (0.15 liters/min)
User interface
8 digit alphanumeric LCD.
Menu driven status and configuration.
Sample interval
1, 2, 5, 10, 15, 30 minutes, 1 and 2 hours
Regeneration interval
6, 12, 24, and 48 hours
Logging capacity
50,000 readings
Power requirements
100-120 VAC, 50/60 Hz, 7 Amps or
210-240 VAC, 50/60Hz, 4 Amps
Control board fuse
Fast Acting IEC 1.6A 250V, 5mm x 20mm
Operating environment
-40° to +55°C (-40°F to +131°F),
non-explosive, 0 to 100% relative humidity
