Model 6634TS TransOhm
Temperature Stabilized Traveling Resistance Standard
Perfect For Automated Measurement Systems
G uildline Model 6634TS is a transportable version of the
6634 Resistance Standard and provides a set of 4 precision
resistances enclosed in a temperature controlled chamber.
Resistance values of 1 ohm, 10k ohms, 1M ohms and 100M
ohms are provided. Optionally, any set of 4 values can be
specified by the customer in the range of 0.1 to 100M ohms.
Each resistance element is isolated and has a 4 terminal
connection at the front panel. The resistance elements are
maintained at 30 +/- 0.01 0C. Chamber temperature set points
of 35 and 40 +/- 0.01 0C are available on request. An internal
battery will typically maintain the temperature for up to a
period of 100 hours depending on the environment when
transported.
Resistance elements are electrically isolated and bonded to an
aluminium block to reduce thermal gradients in the inner
chamber. The inner chamber is designed to electrically shield
the individual elements and an electrical connection is
provided to a guard terminal at the back panel.
The 6634TS is intended to be used as a Transfer
6634TS FEATURES Standard Resistance Reference for Automated
Resistance Measurement Systems
> Temperature Regulation: ± 0.01 0 C over a 1
year period.
Design of the 6634TS reduces thermal bridges between the
> Ambient Temperature Range: 23 ± 5 0C control and monitoring circuits and the resistance elements.
The individual resistance element design is based on the
> Power Requirements: 15 VA
proven Guildline Model 9334 Resistance Standards and
> Voltage Requirements: 100, 120, 220, 240 achieves excellent long term stability and low power
±10% coefficients.
> Cold Power on Stabilization Time: 76 Hours Tellurium copper, gold flashed 5 way binding posts provide for
to specified accuracy (battery discharged) very low thermal EMF when connected to bare copper cables
or gold plated connections. When used with a low thermal
> Stability < 1.5 ppm/year scanner and automated DCC resistance bridge such as the
> Guarded Element Chamber Guildline Model 6675A, full automation of resistance
measurements to 100M ohms is attainable.
> Temperature Coefficient ± 0.005 ppm/0C
> Low thermal EMF
> Temperature Regulation Time Period Using
Internal Battery: 100 hours typical
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
6634TS Temperature Stabilized Traveling Resistance Standard
6634TS Specifications
Nominal Nominal Initial Calibration Stability Stability Stability Temperature Maximum
Resistance Tolerance Uncertainty Over Any 24 First 6 Next 12 Coefficient Voltage
(Ohms) (+/- ppm) (+/- ppm) Hour Period Months Months (+/- ppm/ 0C) (Volts)
(Note 1) (Note 2) (+/- ppm) (+/- ppm) (+/- ppm)
1 10 0.2 0.006 2 1.5 0.005 0.32
10k 10 0.2 0.006 2 1.5 0.005 32
1M 25 5 0.03 5 6 0.01 320
100M 50 18 0.5 18 21 0.3 1000
Note 1: Nominal initial tolerance is defined as the maximum variation of resistance mean values as initially adjusted at the point of
sale.
Note 2: Calibrated in ambient conditions of 23 0C, referred to the unit of resistance as maintained by the National
Research Council of Canada or the National Institute of Standards and Technology and expressed as a
total uncertainty with a coverage factor of k = 2.
A traceable calibration report stating the measurement values and uncertainty is provided with each unit.
Note 3: Stability is exclusive of the effects of applying power above 20 mW, but not exceeding the maximum voltage, in terms of
hysteresis and short term temperature stabilization.
Temperature Stability: +/- 0.01 0C over a 1 year period, exclusive of self heating effects of the resistors.
Range Special values in the range of 0.1 to 100M ohms available at time of order.
Power Requirements: 15 VA
Voltage Requirements: 100, 120, 220, 240 +/- 10%
Cold Power on Stabilization Time: 76 Hours to specified accuracy, (Battery Discharged).
Temperature Regulation Using Internal Battery: 168 hours at 20 0C ambient
72 hours at 0 0C ambient
6634TS Ordering Information
6634TS Temperature Stabilized Traveling Resistance Standard
TM6634TS Technical Manual (included)
Certificate of Calibration (included)
Report of Calibration (included)
GENERAL SPECIFICATIONS GUILDLINE IS DISTRIBUTED BY:
Environment Operating 18 0 C to 28 0 C
< 70% RH, non-condensing
Storage -20 0 C to 60 0 C
< 90% RH, non-condensing
Dimensions H 204 mm (8.0 in) CompuMess Elektronik GmbH
W 280 mm (11 in) Lise-Meitner-Str.1, 85716 Unterschleissheim
D 346 mm (13.6 in)
Tel 089-321501-0 Fax 089-321501-11
http://www.compumess.de oder http://www.netzteile.de
Weight 13.6 KG (30 lbs)
Guildline Instruments Limited
P.O. Box 99
21 Gilroy Street
Smiths Falls, Ontario Canada K7A 4S9
Phone: (613) 283-3000
FAX: (613) 283-6082
6634TS V1.1 Copyright © 2002.07.02 Guildline Instruments Limited. All rights reserved. Subject to change without notice. Web: www.guildline.ca