Maintenance - Signet 9900 Operating Instructions Manual

Specifi cations
Relay Specifi cations
Hysteresis ............................. Adjustable (absolute in
Latch ..................................... Reset in test screen only
On Delay............................... 9999.9 seconds (max)
Cycle Delay .......................... 99999 seconds (max)
Test Mode ............................. Set On or Off
Maximum Pulse Rate ........... 300 pulses/minute
Proportional Pulse ................ 400 pulses/minute
Volumetric Pulse Width......... 0.1 to 3200 s
PWM period .......................... 0.1 to 320 s
Open Collector
Type ...................................... NPN
Max. Voltage Rating ............. 30 VDC
Max. Current Rating ............. 50 mA
Dry-Contact Relays
Type ...................................... SPDT
Form ..................................... C
Max. Voltage Rating ............. 30 VDC or 250 VAC
Max. Current Rating ............. 5 A resistive
Input Types
● Digital (S L) or AC frequency
3
● 4 to 20 mA input via the 8058
● Open collector
● pH/ORP input via the Digital (S
2750/2751 pH/ORP Sensor Electronics
● Raw Conductivity/Resistivity input directly from Signet
Conductivity/Resistivity electrodes via Direct Conductivity/
Resistivity Module or via the Digital (S
2850 Conductivity/Resistivity Sensor Electronics
Sensor Types:
Flow, pH/ORP, Conductivity/Resistivity, Salinity, Pressure,
Temperature, Level/Volume, Dissolved Oxygen, Other (4-20 mA)
Input Specifi cations
Digital (S L) ...................... Serial ASCII, TTL level, 9600 bps
3
Frequency Type Sensors:
Sensitivity ................... (for coil type sensors):
80 mV @ 5 Hz, gradually increasing
with frequency to 2.5 V
Freq. Range ............... (for square wave type sensors):
0.5 Hz to 1500 Hz @ TTL level
input or open collector
Accuracy .................... ± 0.5% of reading max error @ 25 °C
Range ........................ 0.5 to 1500 Hz
Resolution .................. 1 μs
Repeatability .............. ± 0.2% of reading
Power Supply
Rejection .................... No Effect ± 1 μA per volt
Short Circuit ............... Protected
Reverse Polarity......... Protected (no isolation when using
loop power only)
Update Rate .................... (1/frequency) + 150 ms
Current Outputs
● One 4 to 20 mA output in base unit (additional 4 to 20 mA
output available via 3-9900.398-1 Output Module)
● Linear scaling
● Logarithmic scaling for Conductivity
● Reverse span
● Selectable error mode: 3.6 mA or 22 mA
● Test Output mode: allows testing of the current output
● Adjustable 4 to 20 mA end points
● HART communication via optional H COMM Module
Engineering Units)
3 L) output from the
L) output from the
3
Display Ranges:
pH ...............................-1.00 to 15.00 pH
pH Temp. ................. -39.99 °C to 149.99 °C
(-40 °F to 302 °F)
ORP ............................-1999 to +1999 mV
Flow Rate ................... -9999 to 99999 units per second,
minute, hour or day
Totalizer...................0.00 to 99999999 units
Conductivity ................ 0.0000 to 99999 μS, mS, PPM and
PPB (TDS), kΩ, MΩ
Cond. Temp. ............-99 °C to 350 °C (-146 °F to 662 °F)
Temperature ...............-99 °C to 350 °C (-146 °F to 662 °F)
Pressure .....................-40 to 1000 psi
Level ...........................-9999 to 99999 m, cm, ft, in, %
Volume ......................... 0 to 99999 cm
Salinity ........................0 to 99.97 PPT
Dissolved O ...............0 to 20 mg/L, 0 to 200%
2
Output Specifi cations
Current Loop Out ........ANSI-ISA 50.00.01 Class H
Span ...........................3.8 to 21 mA
Zero ............................ 4.0 mA factory set; user programmable
from 3.8 to 4.2 mA
Full Scale .................... 20.00 mA factory set; user
programmable from 19.0 to 21.0 mA
Accuracy ..................... ± 32 μA max. error @ 25 °C
@ 24 VDC
Resolution...................6 μA or better
Temp. Drift ..................± 1 μA per °C
Pwr Sply Rejection .....± 1 μA per V
Isolation ......................Low voltage (< 48 VAC/DC)
Voltage........................10.8 to 35.2 VDC
Max. Impedance: ........ 250 Ω @ 12 VDC
500 Ω @ 18 VDC
750 Ω @ 24 VDC
Update Rate ...............100 mS nominal
Actual update rate determined by sensor type
Short circuit and reverse polarity protected
Adjustable span, reversible
Error Condition ........... Selectable error condition 3.6 or 22 mA.
Test Mode ................... Increment to desired current
(range 3.8 to 21.00 mA)
Open Collector Output ..1
Analog Outputs ...........1 passive

Maintenance

● Clean the instrument case and front panel with a soft
cotton cloth dampened with a mild liquid soap solution.
● Never wipe the front window with static retentive
cloths such as wool or polyester which may induce
a static charge. If a static charge develops on the
window, you may notice temporary blotches form on
the screen. When this occurs, clean the front window
with an anti-static cloth, or a soft cotton cloth and anti-
static spray or a mild liquid soap solution to remove
the static charge.
, m , in , ft , gal, L, lb, kg, %
3 3 3 3
9900 Transmitter 71