Accessories; Technical Data - TESTO 6681 Instruction Manual

1.1.3 Accessories

The following accessories are available for the testo 6681 humidity
transmitter:
Protection caps for probes

Mains unit

P2A software (parameterizing, adjusting and analyzing software)

Assembly accessories.

Information about accessories and their order numbers can
be found in volume 2, chapter 4.2, page 179 or on the
website at www.testo.com.

1.1.4 Technical Data

Parameters
Humidity (various variables and
-
units)
Temperature (°C/°F)
-
Measuring range
Depends on probe
-
Accuracy
Depends on probe
-
Resolution
0.1 % RH or 0.1 °C/0.1 °F
-
Meas. cycle
1/s
-
Interface
Mini-DIN for P2A software
-
(parameterizing and adjusting
software) and handheld testo
400/650
Voltage supply
4-wire (separate signal and supply
-
lines):
20 - 30 V AC/DC,
300 mA power consumption
Maximum load
- 4-wire: 500 Ω (power output)
testo 6681 Ethernet
Analogue output*
0 to 1 V ± 1.5 mV (4-wire) or
-
0 to 5 V ± 7.5 mV (4-wire) or
-
0 to 10 V ± 15 mV (4-wire) or
-
0 to 20 mA ± 0.03 mA (4-wire) or
-
4 to 20 mA ± 0.03 mA (4-wire)
-
Resolution of analog output
12 bit
-
Relay
4 relays, 250 V AC/DC, 3 A
-
(optional)
Display
2-line LCD with plain text line
-
(optional)
- 1.1 Specifications
9