
Automatic Systems Laboratories	Tel: +44 (0) 1737 649300 Fax: +44 (0) 1737 649301 info@aslltd.co.uk

page location: home > metal block calibrators > b series metal block calibrators

Metal Block Calibrators

B Series Metal Block Calibrators

Features
		Ranges cover -25°C to +700°C
		Stability: Better than 0.05°C
		Excellent uniformity for accurate calibration
		Portable, safe and easy to use
		Over temperature safety cut-out
		Standard & custom inserts, to match your probe diameters and comply with IS09000
		Use either upright or horizontal
		Use with an external reference thermometer or optional built-in Independent Indicator and probe
		Serial interface options

Typical Applications
		Site Calibrations for PRT's, thermocouples and thermistors, with or without indicators
		Glass thermometers calibration
		Bimetallic switches calibration
		Dial Indicators (gas) calibration

For more information about this product contact ASL

ASL's B series Metal Block Calibrators let you accurately calibrate PRT's and other thermometers easily and conveniently. These rugged, portable blocks provide a very stable and uniform temperature as standard, but you can specify the options to meet your needs precisely. For example, insert options let you use a wide range of probe diameters, saving time and money and, to allow accurate calibration required by IS09000, inserts with two or more holes accept both reference thermometer and the probes to be calibrated.

The ASL range of Metal Block Calibrators consists of the B700 for temperatures from +50°C to +700°C and the B140 for temperatures from -25°C to 140°C.

To aid rapid cooling from elevated temperatures to ambient ASL has developed the B-Cool forced air cooling probe.

Metal Block Calibrators can be supplied with optional independent indicators and RS485 or RS232C interfaces.

B700 Metal Block Calibrator

The B700 allows you to accurately calibrate RTDs and other thermometers easily and conveniently.

Its large capacity saves you time by holding up to 12 thermometers at once.

Using ASL’s proven removable insert technology the B700 accepts a variety of temperature probe diameters and guarantees repeatable calibration performance to enable you to comply with your ISO9000 requirements.

All B700s are tested over their full temperature range before dispatch and are supplied with a stability test certificate.

B700 Brochure (PDF, approx 198KB)

See the table below for a run-down of this product's features and capabilities.

Range in °C (typical at 20°C)	+50 to +700
Stability	<±0.05°C
Accuracy	see Calibration Accuracy
Uniformity - Insert	<0.03 °C
Uniformity - Block	<0.1°C
Heating Time (Ambient to max)	45 minutes
Cooling Time (Ambient to min)	Dependent on cooling aid
Block holes	4 x Ø18 x 155mm and 4 x Ø6.35 x 155mm (to accept inserts)
No of probes	Up to 12 inc. reference(s)
Probe insert holes	Ø3mm minimum to Ø15mm maximum, up to 2 maximum with depth up to 150mm (not supplied, see insert data sheet).

For more information about this product contact ASL

B140 Metal Block Calibrator

The B140 provides you with a convenient precision temperature source for the calibration of a wide range of industrial thermometers.

Its range is ideally suited to the food processing industry covering the temperatures used for sterilisation, processing and storage.

Using ASL’s proven removable insert technology the B140 accepts a variety of temperature probe diameters and guarantees repeatable calibration performance to enable you to comply with your ISO9000 requirements.

All B140s are tested over their full temperature range before dispatch and are supplied with a stability test certificate.

B140 Brochure (PDF, approx 167KB)

Typical Applications
		Sterilisation processes
		Environmental sensors and systems
		Food storage and processing
		Refrigerated storage

See the table below for a run-down of this product's features and capabilities.

Range in °C (typical at 20°C)	-25 to +140
Stability	<±0.05°C
Accuracy	see Calibration Accuracy
Uniformity - Insert	<0.02 °C, typical
Heating Time (Ambient to max)	10 minutes, typical
Cooling Time (Ambient to min)	25 minutes, typical
Block holes	2 x 16mm x 155mm
Probe insert holes	Ø3mm minimum to Ø12mm maximum, up to 2 maximum with depth up to 150mm (not supplied, see insert data sheet).

For more information about this product contact ASL

B-Cool

The B-Cool forced air cooling probe allows rapid temperature reduction from 700°C to ambient in minutes rather than hours. With the B-cool system, up to eight calibration batch runs can be achieved each day without compromising calibrator accuracy.

B-Cool Brochure (PDF, approx 179KB)

For more information about this product contact ASL

Calibration Accuracy

The accuracy of your calibration will depend on the sum of the accuracy of the reference thermometer with its indicator and the uncertainties associated with stability and uniformity of the block. Be cautious of claims for accuracy with no explanation, as it may be just another way to specify uniformity. The Independent Indicator option has probe data correction to improve accuracy and is supplied with, or without, probe and traceable calibration. For best results, use an external reference such as ASL's F100 or F200 series precision thermometers , offering a traceable system accuracy of up to ±0.025°C.

Read more about Comparison Calibration (PDF, approx 92KB)

Uniformity

Uniformity is defined for the B series as the temperature difference between two probes in a two-hole insert. In the B700 a typical value is also shown for the fixed holes. For customised blocks, uniformity will depend on the design. "Gradient" or "homogeneity" are other terms used for describing uniformity.

Further information

Find out more information about B series insert hole diameters (PDF, approx 46KB)

2 Gatton Park Business Centre
Wells Place
Redhill, Surrey
RH1 3LG