31
T
ECHNICAL
DATA
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17 TECHNICAL DATA
17.1 Performance
r
Standard search head
Range: 40 mm (1.6") bar: 17 mm to 100 mm (0.65" to 4")
8 mm (0.3") bar: 9 mm to 75 mm (0.35" to 3")
Accuracy: up to 65 mm (2.6") depth: ±2 mm (0.1")
over 70 mm (2.8") depth: ±3%
Pitch resolution: 16 mm (#5) diameter bar at 50 mm (2") depth of cover;
pitch ≥ 75 mm (3")
Narrow Pitch search head
Range: 40 mm (1.6") bar: 9 mm to 75 mm (0.35" to 3")
8 mm (0.3") bar: 5 mm to 55 mm (0.2" to 2.2")
Accuracy: up to 45 mm (1.75") depth: ±1 mm (0.05")
over 50 mm (2") depth: ±2 mm (0.1")
Pitch resolution: 10 mm (#3) diameter bar at 30 mm (1.2") depth of cover;
pitch ≥ 55 mm (2.15")
Deep cover search head
Range: 40 mm (1.6") bar: 50 mm to 200 mm (2" to 8")
8 mm (0.3") bar: 25 mm to 150 mm (1" to 6")
Accuracy
s
: up to 65 mm (2.6") depth: ±2 mm (0.1")
over 70 mm (2.8") depth: ±3%
Pitch resolution: 16 mm (#5) diameter bar at 100 mm (4") depth of cover;
pitch ≥ 125 mm (5")
Half-cell mode
t
Range: -999 mV to +999 mV
Accuracy: ±5 mV
Half-cell probes
Stability: 10 mV with 3 µA load
17.2 Physical
Weight (including Deep head search head): 1.6 kg (3.5 lb)
r. All performance figures have been obtained when using Elcometer reference rebars of standard diameter at
room temperature.
s. Accuracy figures for the deep cover search head are obtained once the operating temperature has
stabilised (after 10 minutes continuous use of the search head).
t. Half-cell mode is not included on the Elcometer 331 Model B.
331.book Page 31 Thursday, March 12, 2009 9:51 PM
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