Replacement Parts And Accessories - Welch Allyn 690 Directions For Use Manual

Directions for use
Recommended separation distances between portable and mobile RF communications equipment
The Welch Allyn SureTemp Plus models 690 and 692 is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or user of the Welch Allyn thermometer can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the Welch Allyn thermometer as recommended below, according to the maximum
output power of the communications equipment.
Separation distance according to frequency of transmitter (m)
Rated maximum
output power of
transmitter (W)
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in
meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the
maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.
Note 1: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects, and people.

Replacement Parts and Accessories

To order replacement parts and accessories, please contact the Welch Allyn office nearest
to you.
and the Welch Allyn SureTemp Plus model 690 and 692
150 kHz to 80 MHz
d = (1.17) P
0.12
0.37
1.20
3.70
12
80 MHz to 800 MHz
d = (1.17) P
0.12
0.37
1.20
3.70
12
23
800 MHz to 2.5 GHz
d = (2.33) P
0.23
0.74
2.30
7.40
23