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6712SR Refrigerated Sampler
Section 1 Introduction
1-9
Sampler Power
Requirements:
Nominal: 12 volts DC supplied by the refrigerator
Operational: 11 to 13 Volts DC
Absolute Maximum: 14.4 Volts DC
Power Pack Requirements:
Use only Teledyne Isco-made
power packs certified by UL. (P/N
60-1684-088)
120VAC ±12VAC, 60 Hz., 1.0 Amp.
Note: This is the only version certified by UL. The line cord (mains
connect cable) is the “Disconnect Device.”
Power Consumption
a
6712 Controller in Standby 10 mA
Average Current of Accessories
Controller Display Backlight 228 mA
701 pH Module
b
11 mA
710 Ultrasonic Module
b
11 mA
720 Submerged Probe Module
b
11 mA
730 Bubbler Module
b
— at 2 ft of liquid level 24 mA
— at 10 ft of liquid level 31 mA
750 Area Velocity Module
b
12 mA
780 4-20 mA Module
b
10 mA
YSI 600 with pH, DO, Conductivity, and Temperature
b
11 mA
Programmable Analog 4-20 mA Output Option
c
124 mA
CDMA cellular telephone modem
— standby current 35 mA
— current while communicating 150 mA
GSM cellular telephone modem
— standby current 62 mA
— current while communicating 230 mA
a. Current ratings when input power is 12.5 VDC and ambient temperature is 77 °F (25 °C)
b. Average current when programmed to take readings at 15 minute intervals.
c. Rating for three outputs.
Sampler Only
Operating Current:
Approximately 30 mA based on 200 ml sample every hour, 10 ft (3 m) suction
line, and 5 ft (1.5 m) suction head.
Teledyne Isco External Battery Capacity:Number of Complete Standard Sampling Routines
Nickel-Cadmium Battery Lead-Acid Battery
Sampler Only: 6 9
Sampler with pH Module: 6 9
Sampler with Ultrasonic Module: 6 9
Sampler with Submerged Probe Module: 6 9
Sampler with Bubbler Module (1-2 ft head): 3 5
Sampler with Area Velocity Module: 4 6
Sampler with 4-20 mA Module: 6 9
A Standard Sampling Routine is a 200 ml sample taken every hour in 24 bottle mode, with a 10 foot (3 m) vinyl suc-
tion line at 5 feet (1.5 m) of head. The module is set to take a reading every 15 minutes.
Flow Meter
Signal Requirement:
5 to 15 volt DC pulse or isolated contact closure of at least 25 millisecond dura-
tion. (4 - 20 mA or pulse duration signal may be converted with optional interface
unit.)
Table 1-3 Technical Specifications for the 6712SR Refrigerated Sampler (Continued)